What is cos(pi/2-(pit)/2) ?

The solution to cos(pi/2-(pit)/2) is sin((pit)/2)

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simplify cos(pi/2-(pit)/2)

simplify

cos (\frac{π}{2} - \frac{π t}{2})

sin (\frac{π t}{2})

Solution steps

cos (\frac{π}{2} - \frac{π t}{2})

Rewrite using trig identities

= sin (\frac{π t}{2})

cos (arcsin (\frac{x}{9}))

cos (2 (- x))

cos (2 x - \frac{5 π}{6})

4 sin (\frac{π}{6} + x) - cos (x)

- cos (\frac{π}{3} + x)